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• The OPM 4-4C is calibrated at 850
Excellent unit to double benchmark for quality
ATC does not adjust the PPT reading of a refractometer to the temperature of the aquarium
Syringes and sample filters can be purchased separately
This is THE unit that is used around the world at Boeing
Hanna HI 713 Phosphate Photometer for Marine Aquariums Gliserin • The OPM 4-4C isItem Description: Brand New Hanna Instruments HI 713 CheckerHC Free Phosphate Photometer 0. 00 2. 50 ppm(mg l) NO REAGENTS FINALLY! A SIMPLE LOW LEVEL PHOSPHATE TEST! THIS LISTING IS FOR: (1) HANNA HI713 PHOSPHATE CHECKER Hanna HI 713 Checker Colorimeter SPECS: Range 0. 00 to 2. 50 ppm (mg L) Resolution 0. 01 ppm (mg L) Precision 0. 04 ppm (mg L) 4% of reading @ 25C Light Source LED @ 525 nm Light Detector Silicon photocell Environment 0 to 50C (32 to
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